The maximum number of face turns needed to solve the classic Rubik's cube is 20, and the maximum number of quarter turns is 26. It took 30 years to discover these numbers, which were finally proved by Tomas Rokicki and Morley Davidson using a mixture of mathematics and computer calculation. (The puzzle does have 43 quintillion possible configurations after all.)
So how did the current world-record holder SeungBeom Cho manage to solve Rubik's cube in under five seconds? (4.59 seconds to be exact.)
On March 7, we reported that an NBN Node had been taken out by a car in Kellyville, NSW. In perhaps the perfect summation of everything that has gone wrong with the NBN, that same NBN node has once again been taken out by a car, disrupting services in Kellyville for the second time in two weeks. Less than 24 hours later, it was reportedly then hit for a third time.